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https://issues.apache.org/jira/browse/HADOOP-2870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12575790#action_12575790
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hairong edited comment on HADOOP-2870 at 3/6/08 10:00 AM:
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The new patch incorporates the following comments:
1. Move Client's reference count to Client;
2. Make TaskTracker and JobClient close connections in close;
3. Move client.stop out of the critical section in stopClient;
4. slowping -> slowPing

      was (Author: hairong):
    The new patch incorporates the following comments:
1. Move Client's reference count to Client;
2. Make TaskTracker and JobClient close connections in close;
3. Move stopClient out of the critical section in stopProxy.
  
> Datanode.shutdown() and Namenode.stop() should close all rpc connections
> ------------------------------------------------------------------------
>
>                 Key: HADOOP-2870
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2870
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 0.16.0
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>             Fix For: 0.17.0
>
>         Attachments: closeConnection.patch, closeConnection1.patch
>
>
> Currently this two cleanup methods do not close all existing rpc connections. 
> If a mini dfs cluster gets shutdown and then restarted as we do in 
> TestFileCreation, RPCs in second mini cluster reuse the unclosed connections 
> opened in the first run but there is no server running to serve the request. 
> So the client get stuck waiting for the response forever if client side 
> timeout gets removed as suggested by hadoop-2811.

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